Production and humus form development in forest stands established on agricultural lands - Kostelec nad Cernymi lesy region
2009
Podrazsky, V.,Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Lesnicka a Drevarska | Remes, J.,Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Lesnicka a Drevarska | Hart, V.,Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Lesnicka a Drevarska | Moser, W.K.,USDA, St. Paul (USA). Fotrest Service, Northern Research Station
The afforestation of agricultural lands was carried out under different site and ecological conditions, including lower and medium elevated localities. The present study documents the rapidity of accumulation of surface layers and their characteristics in stands of Pinus sylvestris, Picea abies, Betula verrucosa and Pseudotsuga menziesii in the territory of the Training Forest Enterprise in Kostelec nad Cernymi lesy (Czech Republic), at the altitude 430 m a.s.l., on the site of nutrient-poor gleyed soils. The plots were compared with the neighbouring continuously forested site covered with old pine-spruce stand and with near-situated arable field. During the first roughly 40 years, considerable changes were documented on the afforested plots. Forest-floor humus layers in the coniferous stands have already been formed, the humus forms being more favourable compared with the old forest site. Acidification and loss of nutrients run in the upper mineral horizons. These processes were also responsible for the less favourable character of the forest soil in the old stand. Birch showed minor shifts of soil properties in the mineral horizon compared to the conifers; the surface humus accumulation was not observed there yet. The lowest degradation among conifers was shown in Douglas fir, intensively taking up deficient nutrients.
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